I have the DINAN stage 2 and I'm sorry to say this but I hate it (not enough power and the car sucks gas like there is no tomorrow)
I'm actually planning to switch with the ESS with the Akrapovic tune.
Z4 M coupe with Super Sprint exhaust and X pipe, RPI Scoop, AFE air intake, ESS tune, DINAN 4.10 Limited Slip Differential, OEM CF spoiler.
M3 E92 Coupe with DCT, Akrapovic Evolution exhaust, ESS tune, DINAN 3.62 Limited Slip Differential, OEM CF performance parts.
1M Coupe... Loving it